The main attractions are the Amethyst Tunnel, the Precious Stone House and the Treasure Seeker‘s Field. For kids there is the large Adventure Playground for great outdoor activities.
Great time with kids digging up crystals. Just make sure you pack enough food for them, as food options are scarce in the area until 2pm and warm food only after 5pm.
Nicely designed museum, the tours are in German, but they give you English script. Unfortunately it didn't really correspond to the German presentations.